While the Dow lost 469 points and closed down 2.84 percent, Planet Fitness (NYSE:PLNT) was up 5.6 percent at midday and closed up 2.41 percent at $18.24 ahead of its first earnings announcement on Wednesday. Planet Fitness will report its second quarter earnings after market close at 4:30 p.m. Eastern, marking the first financial disclosure since the company went public in August.

J.P. Morgan and RW Baird analysts also gave Planet Fitness positive ratings, according to a MarketWatch report. J.P. Morgan gave Planet Fitness a $20 price target, citing its franchise model as a key driver for continued growth. Baird gave a $22 price target, expecting to see more than 20 percent growth in earnings per share every year from Planet Fitness.

Other fitness-related stocks closed mixed on Tuesday.

The August slide for Fitbit, San Francisco, (NYSE:FIT), continued into September, and it closed down 4.64 percent at $32.89 on Tuesday. It marked the lowest close since $33.28 on June 29. The company, which makes wearable fitness trackers, went public in June at $20 per share and hit a high of $51.90 per share on Aug. 5.

Brunswick Corp, Lake Forest, Illinois, (NYSE:BC), closed down 4.08 percent at $47.68 per share. The parent company of Life Fitness is trading in a 52-week range of $38.17 to $56.63 per share.

Town Sports International (TSI), New York, (NYSE:CLUB), closed down 1.55 percent at $2.54 per share. TSI, which traded at a 52-week high of $7.69 in January, hit its 52-week low on Aug. 19 at $1.92 per share.

Mindbody, San Luis Obispo, California, (NASDAQ:MB) closed up 0.07 percent at $14.03. Mindbody, which went public in June, traded at a high of $16.25 per share on June 19 before hitting a low of $9.14 per share on Aug. 4.